bueff



I (No Model.)

B. RUEFP, PRESSURE REGULATING STOP 000K.

No. 399,565. A. Patented Mar. 12, 1889.

mnw WM e 0% mm W .m M i W a a khvHJ. nu Q o A. a .0 ma} L WITNESSES:

m/armmvns EiTTEn STaTEs PATENT EErcE.

EMIL RUEFF, OF NE\V YORK, N. Y.

PRESSURE-REGULATING STOP-COCK.

SPECIFICATION forming part of Letters Patent No. 399,565, dated March12, 1889.

Application filed May 24,1888. Serial No. 274,902 (No model.)

To all whom, it 7lb(t 7/ cone/27w.-

Be it known that I, ICMIL RUEFF, a subject of the King of Bavaria,residing at New York, in the county and State of New York, have inventednew and useful Improvements in I ressuire-Regulating Stop-( ocks, ofwhich the :t'ollowin g is a specification.

My invention relates to a pressure-regulating stopcock which is(specially intended for use .in dealing with fluids under a very highpressure-such, for instance, as liquid carbonic acid.

The object of myinvention is, iirst, to provide a perfectly-tight cockwithout the use of the ordinary stui'ii ng-box aboutthe exit of thevalve stem from the easin g, such stu'iiingboxes invariably causintrouble by leakage when lluids under a very high pressure are passedthrough the stop-cock; secondly, my object is to cause the stop-cock toregulate the pressure of the fluid passing theretlnough.

The peculia r and novel construction whereby the above-stated object isaceomplislled is more fully pointed out in the following specificationand claim, and illustrated in the accompanying drawings, in which-Figure 1 represents a longitudinal. section of a stop-cock constructedaccording to my invention. Fig. 2 is a transverse section thereof in theplane .1, 117-, Fig. l.

Similarletters indicate correspondingparts.

In the drawings, the letter A designates the upper section of the casingof my stop-cock. I is the lower section, which is provided at one endwith a screw-ni mle, o, by means of which it can be connected with theflask C, which contains the liquid. carbonic acid. or other fluid undera high pressure. A screwsoeket at the upper end of the section B engageswith a screw-thread, Z, at the lower end of the section A, whereby thetwo sectionsare united.

In the casing A B is formed the usual. receiving-channel, c, and thedelivery-channel. (Z, through which. the fluid contained. in the flask 0passes for distrilimtion.

D is the valve, which is located in the re ceiving-ehannel. c and can bemoved toward and from a seat, It, fori'ned in the lower end of thesection A. In the example shown in the drawings the seat is made, bypreference,

hard, of vulcanized rubber, and in the form of a ring,which is set intoa circular recess in the end of the section A. A suitable metallicpacking-ring, d, placed in a recess in the top of the casing-section l3,bites into the ma terial of the seat E when the two sections are unitedand forms a perfectly tight joint, whereby leakage below the valve D isprevented.

The valve-stem 1?, attached to the valve 1), is extended upward throughthe casing, and in the length of the same is secured, by any suitablemeans, a diaphragm, G, the edge of which is secured air-tight to asuitable flange, c, on the easing-section A.

In the example shown in the drawings the diaphragm is made of softrubber, so as to be flexible; but it may be made of sheet metal or anyother suitable material. To secure it air-tight and firmly to thesection A, its edges are clamped bet-ween the flange c of the same and aflanged cover, B.

The exterior portion of the valve-stem F issubjected to the action of aspiral spring, II, which is located between a shoulder, 71, on the stemand an adjusting-screw, I, which is provided with a thread engaging aninternal thread in the cover 13'. By turning the screw I, the tension ofthe spring II on the valvestem, and consequently on the diaphragm G, canbe regulated.

The exterior portion of the valve-stem is provided with a screw-thread,f, which is engaged by a hand-wheel or nut, J, resting on the top of thecover. It is evident that instead of having the spring II in engagementwith the valve-stein it could be made to engage directly with thediaphragm.

It will be noticed that by turning the handwheel or nut J in onedirection the valveD is moved toward its seat E and closed by the actionof the screw-thread on the valve-stein F and the screw-thread in the nutor handwhecl. If the hand-wheel or nut is moved in the oppositedirection the spring II forces the valve-stem downward, and consequentlyopens the valve.

The actionv of the diaphragm and spring G, as in ordin ary p ressure-reducing valves, serves to close the valve when the pressure on theinside of the diaphragm that is in the lowpressure chamber L becomesgreater than the pressure of the spring H on said diaphragm, and to openthe said valve when the pressure again falls below the tension of thespring.

It is evident that other mechanism can be substituted in place of thehand-wheel or nut and the screw-thread for moving the valve spindle. Toprevent particles of dirt or metal from entering the interior of thecasing and interfering with the action of the valve D, a suitablescreen, K, is formed on the lower end of the casing-section B, suchscreen being best in the form of a nozzle closed at its lower end andprovided with perforations.

It will be readily seen that by properly securing the edges of thediaphragm G to the casing leakage cannot take place about the diaphragm,even at the excessive pressure met with in dealing with liquid carbonicacid, and consequently by using such a diaphragm in place of the usualstuffing-box for the valvestem a great advantage is gained, while at thesame time the construction of the cock is simplified;

What I claim as new, and desire to secure by Letters Patent, is

The combination of the casing having the vertical receiving-channel cand the lateral delivery-channel d, the valve-seat E, located betweensaid receiving and delivery channels,

the valve D, arranged in the casing and closing upwardly upon thevalve-seat with the pressure of the fluid, and having a valve-stem, F,rising through the valve-seat and extending to the outside of the casingat the upper end thereof, alow-pressure chamber, L, in the casing abovethe lateral delivery-channel, a flexible diaphragm, G, closing thecasing at the low-pressure chamber secured to the valvestem, and by itsrising movement under the fluid-pressure lifting and closing the valveupon its seat,a spring, H, located in the valvestem and pressing uponthe diaphragm to force it downward and thereby lower and open the valve,and against the pressure of which spring the valve closes on its seat, awheel, J, outside the casing for lifting and closing the valve-stemagainst the pressure of the spring, the internally-screw-threaded coverB, and the tubular screw-nut I, adjustable in the cover, pressing on theupper end of the spring and through which nut and spring the valvestempasses to the hand-wheel, substantially as described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses. EMIL RUEFF. [L. s.]

Witnesses:

W. C. HAUFF, E. F. KASTENHUBER.

